A group of 850 former Kentucky Wildcats cheerleaders are rallying behind the coaches fired over wild hazing allegations ... demanding they get their jobs back!

As we previously reported, UK axed the cheer team's advisor, head coach and 3 assistants after investigation into a crazy team lake retreat back in February.

The school claims the retreat was debaucherous -- with allegations of team members being forced to booze and perform topless and bottomless cheerleading stunts.

Several active members of the team have disputed the allegations -- but the school fired the staff anyway ... citing results of a 3-month investigation.